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Low-speed signal processing method of ofdm radar communication integrated system

A signal processing and radar technology, applied in the field of signal processing, can solve problems such as integrated signal performance degradation, influence on reference signal reconstruction radar processing, and poor processing effect, so as to improve signal processing efficiency, communication processing capability, and increase robustness Effect

Active Publication Date: 2022-05-17
XIDIAN UNIV
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Problems solved by technology

[0007] However, in the existing research, when the integrated system is in the condition of moving relative to the target, the static channel environment will change, and the bit error rate of communication data will increase, resulting in the recovery of the reference signal compared with the original reference signal. There is an error
At the same time, the processing effect of subsequent pulse compression is poor, which cannot meet the needs of the integrated system
Due to the sensitivity of the OFDM signal to speed, when the pure OFDM method is used, the integrated signal performance will drop sharply, affecting the reconstruction of the reference signal and radar processing

Method used

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  • Low-speed signal processing method of ofdm radar communication integrated system
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Embodiment Construction

[0036] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0037] refer to figure 1 , the specific implementation steps of the present invention are as follows:

[0038] Step 1. Receive the echo pulse signal.

[0039] After the radar transmitter transmits the pre-designed pulse signal, the radar receiver receives the discrete echo pulse signal s ec (n,i), where n and i are both positive integers, n is the number of data points, i is the pulse index, the echo pulse signal includes echo training pulse and integrated pulse, the echo pulse signal s ec The starting position of (n,i) is N o , the total pulse length is N sum , the first M-1 pulse units are the cyclic prefix, and M is the number of distance units.

[0040] Step 2. Eliminate the cyclic prefix.

[0041] (2a) Calculate the extraction position in the echo pulse signal: N s =N 0 +M-1;

[0042] (2b) Since the cyclic prefix is ​​an invalid pulse for echo p...

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Abstract

The invention discloses a low-speed signal processing method of an OFDM radar communication integration system. It mainly solves the problems of high bit error rate of communication data in the prior art, large error of restored integrated pulse reference signal, and poor pulse compression processing effect. The implementation plan is: 1. Receive the echo pulse, and remove the invalid pulse of the cyclic prefix to obtain the effective echo; 2. Mark the type of the effective echo; 3. Use a single training pulse to perform channel estimation, and use the channel estimation result Equalize the integrated pulse; 4. Perform communication decoding on the equalization result to restore the communication information, and then encode the communication information to obtain the integrated pulse reference signal; 5. Perform pulse compression on the integrated pulse and the training pulse respectively; 6. Repeat steps ( 2)‑(5), complete the processing of all pulses. The invention has the advantages of low communication data bit error rate and good pulse compression processing effect, and can be used in an OFDM radar communication integration system.

Description

technical field [0001] The invention belongs to the technical field of signal processing, in particular to a low-speed signal processing method, which can be used in an OFDM radar communication integrated system. Background technique [0002] Traditional electronic equipment has a single function, that is, it only has the function of the radar system or the function of the communication system. When the two functions are required to be realized at the same time, the system is bulky and occupies different resources such as frequency and time. The utilization rate of resources is reduced, but the integration of radar communication can solve the above problems well, and has received more and more attention. [0003] The integration of radar and communication refers to the electronic equipment that has both radar function and communication function in the same electronic equipment system. This kind of equipment can complete the two functions of radar signal processing and commun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41
CPCG01S7/415
Inventor 刘高高鲍丹郑敏华蔡晶晶武斌秦国栋李鹏
Owner XIDIAN UNIV
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